# test_swift.py -- Unittests for the Swift backend.
# Copyright (C) 2013 eNovance SAS <licensing@enovance.com>
#
# Author: Fabien Boucher <fabien.boucher@enovance.com>
#
# Dulwich is dual-licensed under the Apache License, Version 2.0 and the GNU
# General Public License as public by the Free Software Foundation; version 2.0
# or (at your option) any later version. You can redistribute it and/or
# modify it under the terms of either of these two licenses.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# You should have received a copy of the licenses; if not, see
# <http://www.gnu.org/licenses/> for a copy of the GNU General Public License
# and <http://www.apache.org/licenses/LICENSE-2.0> for a copy of the Apache
# License, Version 2.0.
#

"""Tests for dulwich.contrib.swift."""

import posixpath

from time import time
from io import BytesIO, StringIO

from unittest import skipIf

from dulwich.tests import (
    TestCase,
)
from dulwich.tests.test_object_store import (
    ObjectStoreTests,
)
from dulwich.objects import (
    Blob,
    Commit,
    Tree,
    Tag,
    parse_timezone,
)

import json

missing_libs = []

try:
    import gevent  # noqa:F401
except ImportError:
    missing_libs.append("gevent")

try:
    import geventhttpclient  # noqa:F401
except ImportError:
    missing_libs.append("geventhttpclient")

try:
    from unittest.mock import patch
except ImportError:
    missing_libs.append("mock")

skipmsg = "Required libraries are not installed (%r)" % missing_libs


if not missing_libs:
    from dulwich.contrib import swift

config_file = """[swift]
auth_url = http://127.0.0.1:8080/auth/%(version_str)s
auth_ver = %(version_int)s
username = test;tester
password = testing
region_name = %(region_name)s
endpoint_type = %(endpoint_type)s
concurrency = %(concurrency)s
chunk_length = %(chunk_length)s
cache_length = %(cache_length)s
http_pool_length = %(http_pool_length)s
http_timeout = %(http_timeout)s
"""

def_config_file = {
    "version_str": "v1.0",
    "version_int": 1,
    "concurrency": 1,
    "chunk_length": 12228,
    "cache_length": 1,
    "region_name": "test",
    "endpoint_type": "internalURL",
    "http_pool_length": 1,
    "http_timeout": 1,
}


def create_swift_connector(store={}):
    return lambda root, conf: FakeSwiftConnector(root, conf=conf, store=store)


class Response(object):
    def __init__(self, headers={}, status=200, content=None):
        self.headers = headers
        self.status_code = status
        self.content = content

    def __getitem__(self, key):
        return self.headers[key]

    def items(self):
        return self.headers.items()

    def read(self):
        return self.content


def fake_auth_request_v1(*args, **kwargs):
    ret = Response(
        {
            "X-Storage-Url": "http://127.0.0.1:8080/v1.0/AUTH_fakeuser",
            "X-Auth-Token": "12" * 10,
        },
        200,
    )
    return ret


def fake_auth_request_v1_error(*args, **kwargs):
    ret = Response({}, 401)
    return ret


def fake_auth_request_v2(*args, **kwargs):
    s_url = "http://127.0.0.1:8080/v1.0/AUTH_fakeuser"
    resp = {
        "access": {
            "token": {"id": "12" * 10},
            "serviceCatalog": [
                {
                    "type": "object-store",
                    "endpoints": [
                        {
                            "region": "test",
                            "internalURL": s_url,
                        },
                    ],
                },
            ],
        }
    }
    ret = Response(status=200, content=json.dumps(resp))
    return ret


def create_commit(data, marker=b"Default", blob=None):
    if not blob:
        blob = Blob.from_string(b"The blob content " + marker)
    tree = Tree()
    tree.add(b"thefile_" + marker, 0o100644, blob.id)
    cmt = Commit()
    if data:
        assert isinstance(data[-1], Commit)
        cmt.parents = [data[-1].id]
    cmt.tree = tree.id
    author = b"John Doe " + marker + b" <john@doe.net>"
    cmt.author = cmt.committer = author
    tz = parse_timezone(b"-0200")[0]
    cmt.commit_time = cmt.author_time = int(time())
    cmt.commit_timezone = cmt.author_timezone = tz
    cmt.encoding = b"UTF-8"
    cmt.message = b"The commit message " + marker
    tag = Tag()
    tag.tagger = b"john@doe.net"
    tag.message = b"Annotated tag"
    tag.tag_timezone = parse_timezone(b"-0200")[0]
    tag.tag_time = cmt.author_time
    tag.object = (Commit, cmt.id)
    tag.name = b"v_" + marker + b"_0.1"
    return blob, tree, tag, cmt


def create_commits(length=1, marker=b"Default"):
    data = []
    for i in range(0, length):
        _marker = ("%s_%s" % (marker, i)).encode()
        blob, tree, tag, cmt = create_commit(data, _marker)
        data.extend([blob, tree, tag, cmt])
    return data


@skipIf(missing_libs, skipmsg)
class FakeSwiftConnector(object):
    def __init__(self, root, conf, store=None):
        if store:
            self.store = store
        else:
            self.store = {}
        self.conf = conf
        self.root = root
        self.concurrency = 1
        self.chunk_length = 12228
        self.cache_length = 1

    def put_object(self, name, content):
        name = posixpath.join(self.root, name)
        if hasattr(content, "seek"):
            content.seek(0)
            content = content.read()
        self.store[name] = content

    def get_object(self, name, range=None):
        name = posixpath.join(self.root, name)
        if not range:
            try:
                return BytesIO(self.store[name])
            except KeyError:
                return None
        else:
            l, r = range.split("-")
            try:
                if not l:
                    r = -int(r)
                    return self.store[name][r:]
                else:
                    return self.store[name][int(l) : int(r)]
            except KeyError:
                return None

    def get_container_objects(self):
        return [{"name": k.replace(self.root + "/", "")} for k in self.store]

    def create_root(self):
        if self.root in self.store.keys():
            pass
        else:
            self.store[self.root] = ""

    def get_object_stat(self, name):
        name = posixpath.join(self.root, name)
        if name not in self.store:
            return None
        return {"content-length": len(self.store[name])}


@skipIf(missing_libs, skipmsg)
class TestSwiftRepo(TestCase):
    def setUp(self):
        super(TestSwiftRepo, self).setUp()
        self.conf = swift.load_conf(file=StringIO(config_file % def_config_file))

    def test_init(self):
        store = {"fakerepo/objects/pack": ""}
        with patch(
            "dulwich.contrib.swift.SwiftConnector",
            new_callable=create_swift_connector,
            store=store,
        ):
            swift.SwiftRepo("fakerepo", conf=self.conf)

    def test_init_no_data(self):
        with patch(
            "dulwich.contrib.swift.SwiftConnector",
            new_callable=create_swift_connector,
        ):
            self.assertRaises(Exception, swift.SwiftRepo, "fakerepo", self.conf)

    def test_init_bad_data(self):
        store = {"fakerepo/.git/objects/pack": ""}
        with patch(
            "dulwich.contrib.swift.SwiftConnector",
            new_callable=create_swift_connector,
            store=store,
        ):
            self.assertRaises(Exception, swift.SwiftRepo, "fakerepo", self.conf)

    def test_put_named_file(self):
        store = {"fakerepo/objects/pack": ""}
        with patch(
            "dulwich.contrib.swift.SwiftConnector",
            new_callable=create_swift_connector,
            store=store,
        ):
            repo = swift.SwiftRepo("fakerepo", conf=self.conf)
            desc = b"Fake repo"
            repo._put_named_file("description", desc)
        self.assertEqual(repo.scon.store["fakerepo/description"], desc)

    def test_init_bare(self):
        fsc = FakeSwiftConnector("fakeroot", conf=self.conf)
        with patch(
            "dulwich.contrib.swift.SwiftConnector",
            new_callable=create_swift_connector,
            store=fsc.store,
        ):
            swift.SwiftRepo.init_bare(fsc, conf=self.conf)
        self.assertIn("fakeroot/objects/pack", fsc.store)
        self.assertIn("fakeroot/info/refs", fsc.store)
        self.assertIn("fakeroot/description", fsc.store)


@skipIf(missing_libs, skipmsg)
class TestSwiftInfoRefsContainer(TestCase):
    def setUp(self):
        super(TestSwiftInfoRefsContainer, self).setUp()
        content = (
            b"22effb216e3a82f97da599b8885a6cadb488b4c5\trefs/heads/master\n"
            b"cca703b0e1399008b53a1a236d6b4584737649e4\trefs/heads/dev"
        )
        self.store = {"fakerepo/info/refs": content}
        self.conf = swift.load_conf(file=StringIO(config_file % def_config_file))
        self.fsc = FakeSwiftConnector("fakerepo", conf=self.conf)
        self.object_store = {}

    def test_init(self):
        """info/refs does not exists"""
        irc = swift.SwiftInfoRefsContainer(self.fsc, self.object_store)
        self.assertEqual(len(irc._refs), 0)
        self.fsc.store = self.store
        irc = swift.SwiftInfoRefsContainer(self.fsc, self.object_store)
        self.assertIn(b"refs/heads/dev", irc.allkeys())
        self.assertIn(b"refs/heads/master", irc.allkeys())

    def test_set_if_equals(self):
        self.fsc.store = self.store
        irc = swift.SwiftInfoRefsContainer(self.fsc, self.object_store)
        irc.set_if_equals(
            b"refs/heads/dev",
            b"cca703b0e1399008b53a1a236d6b4584737649e4",
            b"1" * 40,
        )
        self.assertEqual(irc[b"refs/heads/dev"], b"1" * 40)

    def test_remove_if_equals(self):
        self.fsc.store = self.store
        irc = swift.SwiftInfoRefsContainer(self.fsc, self.object_store)
        irc.remove_if_equals(
            b"refs/heads/dev", b"cca703b0e1399008b53a1a236d6b4584737649e4"
        )
        self.assertNotIn(b"refs/heads/dev", irc.allkeys())


@skipIf(missing_libs, skipmsg)
class TestSwiftConnector(TestCase):
    def setUp(self):
        super(TestSwiftConnector, self).setUp()
        self.conf = swift.load_conf(file=StringIO(config_file % def_config_file))
        with patch("geventhttpclient.HTTPClient.request", fake_auth_request_v1):
            self.conn = swift.SwiftConnector("fakerepo", conf=self.conf)

    def test_init_connector(self):
        self.assertEqual(self.conn.auth_ver, "1")
        self.assertEqual(self.conn.auth_url, "http://127.0.0.1:8080/auth/v1.0")
        self.assertEqual(self.conn.user, "test:tester")
        self.assertEqual(self.conn.password, "testing")
        self.assertEqual(self.conn.root, "fakerepo")
        self.assertEqual(
            self.conn.storage_url, "http://127.0.0.1:8080/v1.0/AUTH_fakeuser"
        )
        self.assertEqual(self.conn.token, "12" * 10)
        self.assertEqual(self.conn.http_timeout, 1)
        self.assertEqual(self.conn.http_pool_length, 1)
        self.assertEqual(self.conn.concurrency, 1)
        self.conf.set("swift", "auth_ver", "2")
        self.conf.set("swift", "auth_url", "http://127.0.0.1:8080/auth/v2.0")
        with patch("geventhttpclient.HTTPClient.request", fake_auth_request_v2):
            conn = swift.SwiftConnector("fakerepo", conf=self.conf)
        self.assertEqual(conn.user, "tester")
        self.assertEqual(conn.tenant, "test")
        self.conf.set("swift", "auth_ver", "1")
        self.conf.set("swift", "auth_url", "http://127.0.0.1:8080/auth/v1.0")
        with patch("geventhttpclient.HTTPClient.request", fake_auth_request_v1_error):
            self.assertRaises(
                swift.SwiftException,
                lambda: swift.SwiftConnector("fakerepo", conf=self.conf),
            )

    def test_root_exists(self):
        with patch("geventhttpclient.HTTPClient.request", lambda *args: Response()):
            self.assertEqual(self.conn.test_root_exists(), True)

    def test_root_not_exists(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args: Response(status=404),
        ):
            self.assertEqual(self.conn.test_root_exists(), None)

    def test_create_root(self):
        with patch(
            "dulwich.contrib.swift.SwiftConnector.test_root_exists",
            lambda *args: None,
        ):
            with patch("geventhttpclient.HTTPClient.request", lambda *args: Response()):
                self.assertEqual(self.conn.create_root(), None)

    def test_create_root_fails(self):
        with patch(
            "dulwich.contrib.swift.SwiftConnector.test_root_exists",
            lambda *args: None,
        ):
            with patch(
                "geventhttpclient.HTTPClient.request",
                lambda *args: Response(status=404),
            ):
                self.assertRaises(swift.SwiftException, self.conn.create_root)

    def test_get_container_objects(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args: Response(
                content=json.dumps((({"name": "a"}, {"name": "b"})))
            ),
        ):
            self.assertEqual(len(self.conn.get_container_objects()), 2)

    def test_get_container_objects_fails(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args: Response(status=404),
        ):
            self.assertEqual(self.conn.get_container_objects(), None)

    def test_get_object_stat(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args: Response(headers={"content-length": "10"}),
        ):
            self.assertEqual(self.conn.get_object_stat("a")["content-length"], "10")

    def test_get_object_stat_fails(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args: Response(status=404),
        ):
            self.assertEqual(self.conn.get_object_stat("a"), None)

    def test_put_object(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args, **kwargs: Response(),
        ):
            self.assertEqual(self.conn.put_object("a", BytesIO(b"content")), None)

    def test_put_object_fails(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args, **kwargs: Response(status=400),
        ):
            self.assertRaises(
                swift.SwiftException,
                lambda: self.conn.put_object("a", BytesIO(b"content")),
            )

    def test_get_object(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args, **kwargs: Response(content=b"content"),
        ):
            self.assertEqual(self.conn.get_object("a").read(), b"content")
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args, **kwargs: Response(content=b"content"),
        ):
            self.assertEqual(self.conn.get_object("a", range="0-6"), b"content")

    def test_get_object_fails(self):
        with patch(
            "geventhttpclient.HTTPClient.request",
            lambda *args, **kwargs: Response(status=404),
        ):
            self.assertEqual(self.conn.get_object("a"), None)

    def test_del_object(self):
        with patch("geventhttpclient.HTTPClient.request", lambda *args: Response()):
            self.assertEqual(self.conn.del_object("a"), None)

    def test_del_root(self):
        with patch(
            "dulwich.contrib.swift.SwiftConnector.del_object",
            lambda *args: None,
        ):
            with patch(
                "dulwich.contrib.swift.SwiftConnector." "get_container_objects",
                lambda *args: ({"name": "a"}, {"name": "b"}),
            ):
                with patch(
                    "geventhttpclient.HTTPClient.request",
                    lambda *args: Response(),
                ):
                    self.assertEqual(self.conn.del_root(), None)


@skipIf(missing_libs, skipmsg)
class SwiftObjectStoreTests(ObjectStoreTests, TestCase):
    def setUp(self):
        TestCase.setUp(self)
        conf = swift.load_conf(file=StringIO(config_file % def_config_file))
        fsc = FakeSwiftConnector("fakerepo", conf=conf)
        self.store = swift.SwiftObjectStore(fsc)
